1config VGA_ARB 2 bool "VGA Arbitration" if EMBEDDED 3 default y 4 depends on PCI 5 help 6 Some "legacy" VGA devices implemented on PCI typically have the same 7 hard-decoded addresses as they did on ISA. When multiple PCI devices 8 are accessed at same time they need some kind of coordination. Please 9 see Documentation/vgaarbiter.txt for more details. Select this to 10 enable VGA arbiter. 11 12config VGA_ARB_MAX_GPUS 13 int "Maximum number of GPUs" 14 default 16 15 depends on VGA_ARB 16 help 17 Reserves space in the kernel to maintain resource locking for 18 multiple GPUS. The overhead for each GPU is very small. 19 20config VGA_SWITCHEROO 21 bool "Laptop Hybrid Grapics - GPU switching support" 22 depends on X86 23 depends on ACPI 24 help 25 Many laptops released in 2008/9/10 have two gpus with a multiplxer 26 to switch between them. This adds support for dynamic switching when 27 X isn't running and delayed switching until the next logoff. This 28 features is called hybrid graphics, ATI PowerXpress, and Nvidia 29 HybridPower. 30